import { ROLES_KEY } from '@app/constants/decorator.key';
import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { Observable } from 'rxjs';

@Injectable()
export class RoleGuard implements CanActivate {
  constructor(private reflector: Reflector) {}

  canActivate(context: ExecutionContext): boolean | Promise<boolean> | Observable<boolean> {
    const requiredRoles = this.reflector.getAllAndOverride<string[]>(ROLES_KEY, [context.getHandler(), context.getClass()]);

    if (!requiredRoles) {
      return true;
    }
    const { user } = context.switchToHttp().getRequest();

    return requiredRoles.some((role) => user.roles?.includes(role));
  }
}
